Sinkhole develops near #Bertha site, engineers fill with 250 yd.³ of concrete. #liveonkomo pic.twitter.com/YrqxVkEHlX— Charlie Harger (@charlieharger) January 13, 2016
Sinkhole develops near #Bertha site, engineers fill with 250 yd.³ of concrete. #liveonkomo pic.twitter.com/YrqxVkEHlX